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Water temperature in Boulder City (NV) in September

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Is it warm enough to swim in Boulder City in September? Average water temperature in Boulder City in September is 86.4°F and therefore suitable for comfortable swimming. The warmest water in Boulder City in September is 96.8°F, and the coldest is 77°F. To find out the water temperature today and in the coming days, go to Current water temperature in Boulder City

Changes water temperature in Boulder City in September 2025, 2024

To get an accurate forecast for the water temperature in Boulder City for any chosen month, compare two years within a 10 year range using the chart below.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024
September 182.4°F84.2°F
September 284.2°F84.2°F
September 382.4°F82.4°F
September 482.4°F84.2°F
September 582.4°F84.2°F
September 6 82.4°F
September 7 84.2°F
September 8 84.2°F
September 9 84.2°F
September 10 84.2°F
September 11 82.4°F
September 12 80.6°F
September 13 82.4°F
September 14 82.4°F
September 15 80.6°F
Day 2025 2024
September 16 78.8°F
September 17 77°F
September 18 78.8°F
September 19 77°F
September 20 77°F
September 21 77°F
September 22 78.8°F
September 23 80.6°F
September 24 82.4°F
September 25 80.6°F
September 26 80.6°F
September 27 80.6°F
September 28 80.6°F
September 29 80.6°F
September 30 80.6°F

Boulder City water temperature during other months:

You can also view information about water temperature for other months by clicking on the month button below

Where is the warm sea water in September?

Want to know where the water temperature in September is good for swimming? Select the continent of interest, the day of the month and the required water temperature

Region
Date (day and month)
Water temperature: min 60°F
 Average temperature  Maximum temperature

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[1] - The "Blue Flag" is awarded to beaches which fulfill a number of criteria, including: the quality of the bathing water, which must be in accordance with the relevant European Union Directive environmental education and information and beach area management and safety.

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Our report for Boulder City is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.

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